wesm commented on a change in pull request #8302:
URL: https://github.com/apache/arrow/pull/8302#discussion_r499856714
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File path: cpp/src/arrow/ipc/writer.cc
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@@ -982,13 +982,7 @@ class ARROW_EXPORT IpcFormatWriter : public
RecordBatchWriter {
RETURN_NOT_OK(CheckStarted());
- if (!wrote_dictionaries_) {
- RETURN_NOT_OK(WriteDictionaries(batch));
- wrote_dictionaries_ = true;
- }
-
- // TODO: Check for delta dictionaries. Can we scan for deltas while
computing
- // the RecordBatch payload to save time?
+ RETURN_NOT_OK(WriteDictionaries(batch));
Review comment:
I'm not sure if skipped dictionaries will work, but they are permitted
by the format, so it should probably be investigated in a follow up issue
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